Expiratory tube



FIG. 1 is a front, top, and right-side perspective view of an expiratory tube embodying our new design.

FIG. 2 is a front view of the expiratory tube of FIG. 1 .

FIG. 3 is a top view of the expiratory tube of FIG. 1 .

FIG. 4 is a rear view of the expiratory tube of FIG. 1 .

FIG. 5 is a bottom view of the expiratory tube of FIG. 1 .

FIG. 6 is an enlarged left-side elevation view of the expiratory tube of FIG. 1 ; and,

FIG. 7 is an enlarged right-side elevation view expiratory tube of FIG. 1 .

Broken lines are used to illustrate portions of the expiratory tube that form no part of the claimed design. 

CLAIM The ornamental design for an expiratory tube, as shown and described. 